3 Beads Brock String Vision Therapy Sight Focusing Vision Convergence Training Tools for Kids Myopic Strabismus Correction

Brock String Vision Therapy: Made of 3 color beads and line, durable and convenient to use.
Vision Focus: Great for convergence insufficiency training, sports sight training and front sight focusing training.
Widely Used: The vision convergence training tool effectively promote convergence to corrects nearsightedness and strabismus.
Easy to Use: The vision therapy can be used at home. Simple and low-cost. With box for easy storage.
Nice Gift: The brock string for vision therapy will be nice gift for someone who has stacked vision, lazy eyes and more.